Machine tool structure



Sept. 29, 1936. A. F. BENNETT MACHINE TOOL STRUCTURE Filed June 22, 1934IIIIIHIIIIIIIIIIIH UNI HIIIIIIII ..,nunulnlllltlhlmm Patented Sept. 29,1936 UNITED STATES PATENT OFFICE MACHINE TOOL STRUCTURE Application June22, 1934, Serial No. 731,942

12 Claims.

This invention relates to a machine tool structure, more particularly toan attachment whiclfi is. fitted onto this structure; and has for one ofits objects the convenient storing of thisattachment when notin use.

Another object of the invention is the conveniently moving oftheattachment from its stored position to its operative position.

Another object ofthe invention is a construction by which the operatormay move the attachment from its inoperative storage position to itsoperative position without being required to manually support the weightof the attachment.

Another object of the invention is to mount the' attachment in storageposition at a diierent level than when the attachment is mounted inoperative position, and alsoto provide a convenient arrangement formoving the attachment from one level to another as well as moving itfrom one location over the base to another.

Another object of the invention is the provision of a storage locationfor the attachment, which will not necessitate the moving of an overarmor any other part between the time of removing the attachment fromoperative position and the securing of it in its storage or inoperativeposition.

Another object of the invention is .the provision of an integral stopfor the carriage from which the attachment is suspended on the swingingcrane.

Another object of the invention is to provide an adjustment by whichslight variations in attachments may be compensated for in the mountingof the attachment on its crane on the standard.

A further object of the invention is the provision of a crane having twodifferent levels with an easy incline from one level to the other with acarriage from which the attachment is supported movable from oney levelto the other.

A still further object of the invention is the provision of attachingbolts which are permanently carried by the attachment so that they arealways in position for securing the lower part of the attachment to anabutting surface and cannot be accidentally removed and lost.

With these and other objects in View, the invention consists of certainnovel features of construction, as will be more fully described, andparticularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a side elevation of the upper portion of a machine tool,showing the attachment as mounted in position on the face thereof.

Fig. 2 is a perspective view showing the face and upper portion of themachine tool structure with the attachment on the crane swinging aboutthe corner thereof, and approaching a position for movement inwardlyinto engagement with the face of the machine.

Fig. 3 is a perspective view of the upper portion of the machine,illustrating the attachment as mounted in storage position on the sidethereof.

Fig. 4 is a top plan view illustrating the relative location of theattachment in storage and operative positions and the attachment in aposition to swing about the corner of the machine.

Fig. 5 is a side elevation of the crane illustrating a fragmentalportion of the attachment as suspended therefrom.

VFig. 6 is a sectional View showing the adjusting mechanism in detail;

Fig. '7 is a side elevation of a fragmental portion of the attachment,showing the cap screw locating means;

Fig. 8 is a sectional view of Fig. 7.

In the use of an attachment for machine tool structures, such as millingmachines and the like, it is usual when the attachment is removed fromworking position to transport it to the tool room at some distance fromthe machine, which requires considerable time and the exertion of agreat deal of energy of the operator in transportation; and in orderthat the attachment may be more conveniently handled, I have provide-dan abutting surface on that side of the machine not ordinarily used andat a location fixed with reference to the working position, for themounting and storage for the attachment when notA operating; and inorder to move the attachment from its operative to its inoperativeposition on the machine, I have provided a crane mounted on the machine,upon which there is mounted a carriage which supports the attachment andby which while suspended, it may be swung from one position to anotherthru 90. I have also found that it is much more convenient to providethe storage position of the attachment on a lower level than theoperating position thereof, whereby the attaching plate does not have tobe built upv on the side of the machine, which is curved in contour, andI provide my crane with two different levels and arrange the crane sothat when the carriage which supports the attachment is on the upperlevel, it is in position to be bolted onto the face or operatingposition, on the machine and when on the lower level and closer to itspivotal axis of the crane, it will be in a position to be bolted in itsstorage or inoperative position on the machine; and I have connectedthese two levels by an easy incline, whereby the carriage may be readilymoved from one level to the other, without it being necessary for theoperator to lift the attachment and thus bear and support the weightthereof; and I have also provided a limit by turning up the end of thecrane so that the carriage cannot be detached from the crane and also anadjustment for moving the attachment with reference to the carriage; andthe following is a detailed description of the present embodiment ofthis invention by which these advantageous results may be accomplished:-

With reference to the drawing, the standard of the machine tool is hereshown as generally rectangular in shape, the front of which isdesignated ID with a face II, while the back is indicated at I2, andsides at I3 and I4. A knee I5 is movable vertically on the front of thestandard, and a carriage I6 suitably supports the work IT illustrated indotted lines in Fig. 1. There projects thru the face I I overarms I8 forthe spindle I9, the overarms I8 being shown as retracted in 'A' Fig. 2but projecting beyond the face II a dis- -provided with a connection forthe rotatable spindle I9 so that the mechanism in the attachment isdriven by the spindle I9.

The attachment 20 is mounted in operative position on the face I I onthe front of the standard by means of cap screws 2I which extend intothreaded openings 22 in the lugs 23 extending outwardly on the sides ofthe face II. These cap screws 2I are permanently altho rotatively,mounted in the attachment being secured therein by a pin 24 lodging inan annular groove 25 in the cap screw 2|. By this arrangement, the capscrews cannot be accidentally withdrawn from the attachment and lost butare always in a position for the use for which they are intended.

'When it is desired to operate the machine tool with an arbor for thecutter in the spindle I9, it is necessary that the attachment beremoved. Such an attachment is heavy and is frequently kept in astoreroom some distance from the machine, which necessitates theoperator carrying the attachment to the storeroom; and in order tolessen the labors of the operator and conserve his time, I have provideda space on the side I4 of the machine as a storage position for theattachment. The side I4 of the machine is provided with a plate 21 whichis tapped with a pair of openings to receive the cap screws 2I which arepermanently mounted in the attachment 29.

In order to swing the attachment from operative to inoperative positionupon the plate 2l, I have provided a crane 28 which is pivotally mountedon the post 29 on the top of the machine so that its hub 39 may swingfreely about this post 29 as a pivotal point. Upon the crane there ismounted a carriage 3| having a wheel 32 to engage with the upper edge ofthe crane, which forms a track for the wheel, this carriage beingbifurcated and provided with an adjustment designated generally 33,which suspends the attachment from the carriage.

Y This adjustment consists of an upstanding threaded member 34 screwedinto the attachment 20 at its end 35 and locked therein by a nut 36engaging a washer 3'1 which engages the top of the attachment. Thru thebottom 38 of the bifurcated portion of the carriage, a threaded member39 is rotatably mounted and upon which there is a nut 40 positionedwhich engages a washer 4I resting upon the portion 38. This nut 40 issecured to the member 39. There is also a socket part 42 screwed ontothe lower end of the member 39 and fixed thereto by a pin 44. Thissocket 42 is threaded at its lower end 45 to threadingly engage themember 34 so that as it is turned thereon the attachment can be raisedor lowered. The turning oi the socket 42 is accomplished by an enlargedportion 46 thereof knurled on its outer surface, as illustrated at 4l,see Fig. 5.

The outer end of the crane is turned upwardly as at 48, to provide astop to limit the outward movement of the carriage 3I and when thecarriage is at its outer position against this stop, the length of thecrane is such that the attachment may be swung clear of the corner ofthe machine, as illustrated in Fig. 4. The storage position of theattachment when clamped to the plate 27, is at a level lower than theoperating position of the attachment when clamped to the face II, and Ihave chosen this arrangement of the lower position so that it will beunnecessary to cause the plate 2l to extend up where it will break theline of the curve connecting the side I4 and the top of the machine,which will not only detract from the appearance of the machine but Ywill also require additional casting material. I also choose thelocation of the plate 2 in a plane at substantially from the face II asat this point it will be unnecessary to move or disturb any parts of themachine, or make any adjustment, it being merely necessary to detach theattachment and swing it to this storage position and there clamp it bythe cap screws 2l. I have chosen the mounting plate at a location sothat an easy incline may connect the two different levels on the crane.

The upper level on the crane is designated 58 from which the carriage issupported when the attachment is in its operative position, while I haveillustrated a lower level 5I upon which the carriage is located when theattachment is to be in inoperative position. These two levels areconnected by an incline 52 so that the wheels 32 of the carriage may beeasily slid from one level to the other without it being necessary forthe operator to lift the attachment by a too abrupt level from oneposition to the other.

Operation In operation, it is merely necessary for the operator tounscrew the bolts 2I which mount the attachment on the face of themachine, roll the attachment out to the end of the crane where thecarriage will abut the hook 43 and then swing the crane thrusubstantially 90 so that the attachment will be opposite its inoperativemounted position, or the plate 21 and then move it inwardly to the lowerlevel 5I where it will be secured to the plate 2l' by the cap screws 2iwhich as previously pointed out are in permanent position in theattachment and may be utilized conveniently for securing it in position.This Saves the operator traveling to the tool room; saves him liftingthe weight of the attachment, and thus conserves his energy as well ashis time. If it is necessary or desirable to substitute one attachmentfor another, this may be easily done by disconnecting the attachment 20by rotating the nut 42 by the knurling 4T, or if it is desired thatadjustment of the height of the attachment be made, this same nut 42 canbe utilized for this purpose.

The foregoing description is directed solely towards the constructionillustrated, but I desire it to be understood that I reserve theprivilege of resorting to all the mechanical changes to which the deviceis susceptible, the invention being deiined and limited only by theterms of the appended claims.

I claim:

1. In a machine tool structure having an upright rigid stand, anabutment thereon thru which a rotatable spindle extends, an attachmentmounted on said abutment for cooperation with said spindle, said standhaving a second abutment removed from the iirst abutment for mountingthe attachment in inoperative position, whereby both positions of theattachment are xed with reference to each other.

2. In a machine tool structure having an upright stand, an abutmentthereon thru which a rotatable spindle extends, an attachment mounted onsaid abutment for cooperation With said spindle, said stand having asecond abutment removed from the rst abutment for mounting theattachment in inoperative position, said abutments being disposed ingenerally right angular planes relative to one another.

3. In a machine tool structure, an upright rigid stand having anabutment thereon thru which a rotatable spindle extends, an attachmentmounted on said abutment for cooperation with said spindle, said standhaving a second abutment removed from the rst abutment for mounting theattachment in inoperative position, said second abutment being at adifferent elevation than the first abutment.

4. In a machine tool structure having an upright rigid stand, anabutment thru which a rotatablel spindle extends, an attachment mountedon said abutment for cooperation with said spindle, a second abutmentremoved from the rst abutment thereon for mounting the attachment ininoperative position, and means movably mounted on said stand forsupporting and swinging said attachment from a position on one abutmentto a position in engagement against the other abutment.

5. In a machine tool structure, an upright rigid stand having anabutment thru which a rotatable spindle extends, an attachment mountedon said surface for cooperation with said spindle, and said stand havinga second abutment removed from the rst abutment thereon for mounting theattachment in inoperative position, whereby both positions of theattachment are iixed with reference to each other, said second abutmentbeing at a different elevation than the iirst abutment, and meansmovably mounted on said stand for supporting and swinging saidattachment from one abutment into position to engage the other abutment.

6. In a machine tool structure having an upright rigid stand, anabutment thru which the spindle extends, an attachment mounted on saidabutment for cooperation With said spindle, a second abutment removedfrom the rst abutment for mounting the attachment inl inoperativeposition, and a crane movably mounted on said stand for supporting saidattachment and swinging it into position to engage either of saidabutments.

'7. In a machine tool structure having an upright stand, an abutmentthereon thru which a rotatable spindle extends, an attachment mounted onsaid abutment for cooperation With said spindle, a second abutmentremoved from the first abutment and at a different horizontal level formounting the attachment in inoperative position, and a crane pivotallymounted on said stand for supporting said attachment and swinging itinto position to engage either of said abutments, said crane havingportions in diierent horizontal planes with a carriage movable along itfrom one end to the other, said crane portions cooperating With meansfor positioning said attachment at desired locations.

8. In a machine tool structure having an upright rigid stand, anabutment thru which a rotatable spindle extends, an attachment mountedon said abutment for cooperation with said spindle, a second abutmentremoved from the rst abutment for mounting the attachment in inoperativeposition, said abutments being in generally right angular planes, and acrane movably mounted on said stand for supporting said attachment andswinging it into position to engage either of said abutments.

9. In a machine tool structure having an upright stand, and a pair ofspaced abutments for the mounting of an attachment, a crane with acarriage thereon for moving the attachment from one abutment to theother, said crane having integral means at one end thereof for thelimiting of movement of the carriage therealong.

10. In a machine tool structure having an upright stand, and a pair ofspaced abutments thereon for the mounting of an attachment, a crane witha carriage thereon for moving the attachment from one abutment to theother, said crane having a hook at one end for limiting the movement ofthe carriage.

11. In a machine tool structure having an upright stand, an abutment onsaid stand thru which a rotatable spindle extends, an attachment mountedon said abutment for cooperation With said spindle, said stand having asecond abutment removed from the rst abutment for mounting theattachment in inoperative position, and means carried by the attachmentand cooperating with means in each of said abutments for securing theattachment against either of said abutments.

12. In a machine tool structure having an upright stand, an abutmentsurface on said stand thru which a rotatable spindle extends, anattachment mounted on said abutment for cooperation with said surfacefor mounting the attachment in inoperative position, said stand having asecond abutment removed from the first abutment for mounting theattachment in inoperative position, bolts rotatably secured in theattachment and cooperating with means in each of said abutments forsecuring the attachment on either of said abutments.

ARTHUR F. BENNETT.

fioY

